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Item type:Publication, Access status: with files , Triboelectrification during non-wetting liquids intrusion–extrusion in hydrophobic nanoporous silicon monoliths(Elsevier, 2025-12-15); ; ; ; Triboelectric nanogenerators (TENGs) have emerged as promising devices for converting mechanical energy into electrical energy through contact electrification and electrostatic induction. However, the generated energy, unlike instantaneous power, current and voltage, is rarely addressed in the vibrant research field of TENGs. In this study, we investigate Intrusion–Extrusion Triboelectric Nanogenerators (IE-TENGs) based on nanoporous silicon monoliths and non-wetting liquids (i.e., water and a 1 mg/mL polyethylenimine solution), addressing the energy generated during this process, conversion efficiency as well as the mechanism underlying the observed phenomena. Compared to powder-based IE-TENGs, the use of monolithic silicon structures enables more efficient and reproducible energy harvesting, with significant improvements in both instantaneous power density and energy per cycle. We also analyzed the impact of compression rate and liquid properties on electrical output, showing that higher compression rates improve power generation, while modifying the liquid medium significantly improves conversion efficiency, reaching up to 9 %. Furthermore, through computational analysis, we identify the crucial role of grafting defects on the generated triboelectric output. This work introduces a novel approach to triboelectric energy harvesting by implementing a monolithic nanoporous architecture and offering an alternative pathway for enhancing contact electrification via confined solid–liquid interfaces. These findings provide new insights into the triboelectric behavior of porous systems and pave the way for next-generation high-performance IE-TENGs, with potential applications in wearable electronics, environmental energy harvesting, and self-powered sensing systems.Publicationtype: Journal Article38 72 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Hierarchical aerographite nano-microtubular tetrapodal networks based electrodes as lightweight supercapacitor(Elsevier, 2017-03-08); ; ; ; A great deal of interest has been paid to the application of carbon-based nano- and microstructured materials as electrodes due to their relatively low-cost production, abundance, large surface area, high chemical stability, wide operating temperature range, and ease of processing including many more excellent features. The nanostructured carbon materials usually offer various micro-textures due to their varying degrees of graphitisation, a rich variety in terms of dimensionality as well as morphologies, extremely large surface accessibility and high electrical conductivity, etc. The possibilities of activating them by chemical and physical methods allow these materials to be produced with further higher surface area and controlled distribution of pores from nanoscale upto macroscopic dimensions, which actually play the most crucial role towards construction of the efficient electrode/electrolyte interfaces for capacitive processes in energy storage applications. Development of new carbon materials with extremely high surface areas could exhibit significant potential in this context and motivated by this in present work, we report for the first time the utilization of ultralight and extremely porous nano-microtubular Aerographite tetrapodal network as a functional interface to probe the electrochemical properties for capacitive energy storage. A simple and robust electrode fabrication strategy based on surface functionalized Aerographite with optimum porosity leads to significantly high specific capacitance (640 F/g) with high energy (14.2 Wh/kg) and power densities (9.67×103 W/kg) which has been discussed in detail.Publicationtype: Journal Article94